import java.lang.*;
import java.awt.*;
import javax.swing.*;
import java.util.*;
import javax.swing.border.*;
import java.awt.event.*;
import javax.swing.event.*;

public class ScalePanel extends JPanel implements ChangeListener   
   
   {
	 JMeter meter;
	 JScale scale;
	 float value;

/** The ScalePanel class takes in three parameters a Meter, a Scale and a Rectangle which
  * stores the size of how big you want to make the ScalePanel. It then uses these three
  * parameters and places them in their rightful positions.
  */

   public ScalePanel(JMeter m, JScale s, Rectangle rect)
	{
	  super();
	  this.setLayout(null);		// this just sets the layout and size of the panel
	  this.setBounds(rect);		// this sets the size of the ScalePanel
	
	  this.meter = m;		 
	  this.scale = s;		

	  int pheight = (int) rect.getHeight();		// gets the height and width of the panel
	  int pwidth = (int) rect.getWidth();

	  this.scale.setBounds(0,pheight/6,pwidth,(pheight-(pheight/6)));     // this makes the size of the scale a fraction of
										//the panel
	  this.scale.addChangeListener(this);		// adds a listner to the scale                           

          meter.setBounds(0,0,pwidth,pheight/6);	// this creates the meter and places it on top of the scale 	
	  this.add(meter);			
	  this.add(scale);				// this adds them on the panel
	
	  value = scale.returnValue();            	// takes the current value and places it on the meter  
          meter.setValue(value);  	

	}

  public void stateChanged(ChangeEvent e)
                  {

                        value = scale.returnValue();		// this updates the meter when the scale is changed
                        meter.setValue(value);

                  }

   }